In all honesty, i would dish out an extra 30$ and try to get a 20g tank, or a 29g tank, it opens up your choices by alot and the bigger the tank, the easier it is to take care of. But, if a 10 is all you can get for now, i would get a small school of tetras. They stick together quite a bit, My neons do anyways, and there pretty to look at.